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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9e3fa0bef40c5e12b89a40ab6e641af89e75c7c1d843f5e9e189497ec77c1677' 
  AND token = 'tY98YrfOLKCNiYD7B3jchGbqMfzdIKBQ1V9df33uSBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}