Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff32b1bdd3d7cd32ce6842310ef5c231e810509c7bfa7f77c87c3d5bac9affd3' 
  AND token = 'H8pw446HPg9iRU2Utx/QcibGU5Qf6/+b0VRGrnYYCYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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