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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'a8484f53db7e8d3fd3e6de0a3ced13c8cc4d0209c2e7712cc895cb7429fc1f24' 
  AND token = 'Eco4EheSEi7zwhYYgXJGzOPL8uJPg3P7sCCnAutTjBo=' 
  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"
    }
  }
}