Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3940a02fce9dd11fc36ab12e84bfe067839760272c396af16439ee0e49475d51' 
  AND token = 'l7qGuPkrkmTvclHJ3aPkaiVEvCdgFjp9pOhSxFQ9nTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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