Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b74871c60323d1c20c17da51c1dccefb118366dd6a54c6033cae4de95e821cb' 
  AND token = 'LGBvGxwtunC1vIhALTXJ/AHDH5PO3y5OnUAzuifturQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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