Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70f5ce978404cbadb7834331d0679b7a9d192b59fbe3284a86a257b772c8ca0c' 
  AND token = 'v8Ah9VObv4aqNaO304kQYqEveD0h0Szvd0VN3CeQ55E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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