Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc095d186517adb4e0a7d406f5492f28fb503bf0c08cd210d9bfbe5c325cbc22' 
  AND token = '1JQ+sHFt3yIpjfhwBVmvuK3Uf02HIT6dEcmTGBwBxfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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