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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1944b214a90f257ffc74a82e4c74b0362c554783f7406ad1ea36cab1797fe9d5' 
  AND token = 'WFqCkh4J4vKePgQvr+3hQYLteU2aDvPaneVFLbQe0zE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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