Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17990ab7a019e232dd2be767a94bb845ea2f924ac83344f310edc63089bd9924' 
  AND token = 'IIzuK7uT8+af4qxdlzAVPLfkixtGlTOzVwm3zqBXCR4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}