Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f72e7e8ff961a7130e475b9577d30ea03c91b1efe63a3ce53f42191c5cdcc0f2' 
  AND token = '9Kl9sAmnhK9gQ37wTYGMccWA3Yc29clG2apRS+ui5Eo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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