Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aab3d9203f327ddc10e0b43d3eb816db7aad121f596e238dcbb4cec515721508' 
  AND token = 'hExi/FmpALsWXjy3zO5VnK0tQv4sm9EBDkHKgS6z3Yc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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