Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbe03fd643525692c5f6b4a427fed8be50a9878c88f2394bb4ac15b3e3d990f8' 
  AND token = 'P3axneAhT10gMQAoWX2wXDSaTsqkYt2tjk/frws6DUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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