Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2150c6c494971157da3209008b02c3fc8320a2987da2dce42ed54a5d1906355' 
  AND token = 'rqwag+2coBrTQnpv1wRKYkm5XPf8kszALHo2V7TqL1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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