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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7dec2d9ef69f1ab8ae6f3521ad9a27907597e4f250f370c45918cb2d6be6426f' 
  AND token = 'wJ00whacYxZu0s/6y5+5jfVVKRim0es8mUsnsJKN1VA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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