Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb2089743cbce54ffb2084b2c61ede0b9c0c6b01bf6b398d77bb987b2c21cfc9' 
  AND token = '5ABP+VwknfIT1952+m9ym0ZxgKPTxikYWoCUJ9dhb+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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