Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fce274776e3734de3f64caafbba3995771cf871a0e4e7e33956214e2355ae085' 
  AND token = 'QEZUP3Pz3YFqQi7pecc1xILQpIIO1Fvp7OogPs6/ZSY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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