SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93855f17bed97c384b8da7a59560ca3359a279f6d457c1fa776871f8d0c69fcb' 
  AND token = 'v/G4nKjD74Kf058iJLq/4UCig72gaqO+XxCcljlB31I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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