Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff23263d6077e7b3cf6b302d768ce2f4bae9acaf6a5e328dd407a71325502fe8' 
  AND token = 'kL827GfNE32P1CbXFgqwC9QV0odExLEYkjCyo7qp1ug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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