Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '804687aba27cb6cfa66f9099ae768a2d98aa525bdbe447ed6924f9f9aa6f9dfc' 
  AND token = 'Qv3chxHkJZrhh8AS7nTSU55Zu6nwoB/Ni2U2+TLVUHg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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