Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cd5fc400353f6a8dcc38579c2cb553c1a4b411074a3b56227f16408769df189' 
  AND token = 'LQVFGVCjr/6oK9rGFSWLeQ8z3VHMKSi2Bw3E6dtctkM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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