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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86cc7234a1d6253788b79bc11458c06b60aa3f562a1dc7b436e5d7a73d38fd80' 
  AND token = 'WAtbTjGa3n+W7pVOsFZ0m1QsEfNc9s99unz/8MgvHvk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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