Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67db3f633bc7325e1fb9308126ab527836340eb40d89669c64b51fd7a0b3a28e' 
  AND token = '5EmlyESekkf9QjYgKcOo609Gla8K0oFEhGy2E2yM1i0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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