SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '193fc76da9363d4ff47d0721531ad9fca058c738ccab1b95b77d41b29da002dd' 
  AND token = 'vgYBRnUhpXMe/RipJfBGI4n/rEOPTxdTd7M6Tw2sz5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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