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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e596b7163d50e35e83f3a183376d15ae8c5285fd408eb6b2f973e77d4fba3f35' 
  AND token = 'oVZp4vPId3IkyxqWkavKZFWNa6Uy4kKchB0MJ0FdKhY=' 
  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"
    }
  }
}