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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fa03543483c725b8167dcc1ce8e41eb8fd974a112bbaaf7bfb66758bd4bb609' 
  AND token = 'sK0fX7yat3SS/Poau2ts0l8bMZnB1hL08Dxw6LWbmIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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