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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e532140c157c4ffb38e8d9b803fbeebb9ac3e3b9203962151041a40f6cf93b02' 
  AND token = 'bFXOj+4fz9rdnA1oIuS95c7pBUYYGFOv6PadAUM9roc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00149

JSON explain

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