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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f5324c542c9bf44c951bf32af6c2cb6238cb7a35a4e94910ca37de715e62358e' 
  AND token = 'pib77J53lpXK89cZfeICTFD7L1Gpc+wlgEKZ7dDAiCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}