Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b087a6b0bdb5f6370bea05c6ff8382f5d81fb47ee65bdd5db1348172d416f5f7' 
  AND token = 'ZdQYTK9e1+gaDfSS5yUDISlCYOvl7ksX8yhg44KF6uM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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