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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f131d1201e11bbd3e695d7566f8a7b55968a4034df41bd7c503e04815bdc021' 
  AND token = 'C2eHXAV8WRgYGIFk5jhy72BtsUE9pAq8eJw64CH2h7o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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