Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4603f15c7d8c420462028fbd9e3763cdfd419d9442b59d57c71894b89bed1724' 
  AND token = '9U5I8krWdCf+CVrKwEpKJcWdgQPkCO5eDDTktsNI5pc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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