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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14171b5f74e737c977973d6bc6a9a89e0116428c63d896f7f404b6db1110f2b6' 
  AND token = 'HRt2D6dDCHwVYm9tb//2Jnvo9GHQMfJtfnPEfIUKfk4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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