Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4a46d5ae0c8756c62445bf6ca23cd6caa557fb8a087e98bff0c8efbbc90cdb7' 
  AND token = 'DZJIApE+Q0ANIqVhvLHX6ukBF3Jx8eNOyGXYVfstsYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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