Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27274ed5867b16d3973d341da42060e56c0fd4ea9b94e15c4368f84cc3e7783b' 
  AND token = 'Cfceh37sLVvURgdFSGqURpsRMhx4lX7W1MMn8GCkE2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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