Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7f48478a2575d53cdac741ef5bebcc293f91def8fa6e1c42fa0f1a12f554119b' 
  AND token = 'fyLwwaOLTg18uZgoJJMgHLqToSET3ZxYC1r6HiPvsLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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