Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52ae57f752a8c43f1a3af4446f6370bcc41ed135da196b03b9948c3fdbc7b263' 
  AND token = 'RolkAc0Pfzy3fzCpX5g+OcmcxwCllNaURZiBCsNPzac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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