Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a54e9874fb5cdaeb7320560668344cedea394b87bd2552e503baf4889195743' 
  AND token = 'cwPAs0ub3/Q4xQzsV85blzygjt9/BuPsElmFpmox7y8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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