Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f21734c1b988bc6fe1f949d0a1caf8cafeaaacc9157cafea621935ed85a17c2' 
  AND token = 'ZntCT7w0dz5g2aLqnEFjJUdpLUR4YPwC9wOPrLKPSRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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