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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54ae9034c32dc383114ea76cf17110763d2c17b10b1375f84d790bc53e9c8745' 
  AND token = 'xUDaCniLho3gMbj4KFqrR+Er6uFQQvRyZWAdPEooYac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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