SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f27c72a372fa57c9ab38cb149e906489295f766d42c85126865a2d04a16b5110' 
  AND token = 'FDNE7dRsYtRcd+qdKs81F9n+l/JuKMiw3Vkmw7aeVIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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