Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38877061679d8fa3dc6fb1142ba5020f7e363967d696840cbebb34a7a7cf96f6' 
  AND token = 'WE4Icyie2xiebpICOiUVe1wwH382eDD9RWav6fANFvY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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