Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a449ac52506088320df54d730a73e3a841b285bc6db655d9d5208e3e7cdc88b9' 
  AND token = 'acjPkp8MKbr13XsVyVeoOmUiclcVvvZOzjW0BaA1+Zo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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