Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fa3ea11eb394d5964f422f38e558ecde0039b133f3ffe917f716391ae5f950a' 
  AND token = 'e70PPYDFsm2omhPTKrFmzDoF5dsuvN0ABM+RqJ5YDJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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