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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '007ae86d22f6fff1852e17286ee6ce07a5c3e0ff6d6b1beb68444064982df1ca' 
  AND token = '1ZLIhUcmuVM8d/hxa2c1UskGSbWCcV3RX5JOicUB2S8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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