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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1905d5eabb39f7d0e5e1c23fddb3de5daa82b3919cb0877e5f95e3556ad9b042' 
  AND token = 'kkIhO0EuYjHtdSvE+KDg75YruF7m9Fjs9fJ6XMtkFf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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