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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '106c5998eeba91ae86b7400c147d1e687f885f6d8aeba74469bf0e20b941c0de' 
  AND token = 'cfc1q8bTG7FJsVX94RVeHmBk3P7S+gobiyJml/o/8Ys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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