Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7cffdb01c608384b188b32053335265e43501b73c71774fe26996aa998a1271' 
  AND token = 'dL6+sA/ARLYGl96hIUqcQ6sPXROROcfk/COh73Tf3LU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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