Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ac01d0bb5c5de51d87b4f09c2075e5b664c8f6e0dd74459af2fab2012a1a563' 
  AND token = 'nrBZqXqTgP45ITOsLH/tYlGnawFxIqT6zbTNNDHJQkM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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