SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07139009371ac7f46f73491e6a626cd18e268e72edb6dba5b1e1c83553281534' 
  AND token = 'YsRaSOb5VyM/flFqdeuft7/KJVkLHa9BxV+9SpjbnZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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