Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53c0d0e4e52790213ff1b0e94241ecb8fcee8581020d47341998b7ef839ace2a' 
  AND token = 'nsvhnjlufY+i9YnEzJPh4OlM2Tt4l8ooIdGsNtzIazQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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