Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0194a982cfa87490977739d4728116f2c05a88c6b1ede042dce8d4544ca41ee2' 
  AND token = 'VM9xdUqulOV2VE98IzUrrMnlallGJIEKwcBz4zTNytQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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