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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc223059381e1e03b69341a9ac66530cfb23377e3aa5c7eb7e84b96e065c6aa2' 
  AND token = '4DP1kjy5jpt6xSe1V4tGG7Q9L4lBBQUJutxfPufXb8A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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