Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e15f337d7417218d620a37f4aacaeacefc03dd497731b2b3e324fd30ef495fbd' 
  AND token = 'ONgfZR/JKYXY5mImBq+UTCzmNraNGdXY7UeIEvjGYsU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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