Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76ed6a5d7137959f146740f9dc7315f99abb8778b657664342628fc73e3473da' 
  AND token = 'dAOm24m58u99O8mDclQ1tzGD+r7IgT51ea6nkALcsKw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

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