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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e05d3da1db5c4a49cb2de142ee53d363a7829f01a7b6220157e00c0af4a2f60e' 
  AND token = 'JytqsWlr0bncPNwCl1Ad9H1TzKzvD4ewol0gg0xawmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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