Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7050107ec90ae1422367a47955a09c519335944ce1c55182933a29c86552043' 
  AND token = 'RFexJ5teh25QpPCSE34MIh2G2ylezu9C3C+vF8+Bxeg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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