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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79162adc4959320e68f9ff055bcc6321d1bc4e8d7d45b8dd7d376b12cb3bb039' 
  AND token = 'HFIxV9X5zCV263AbAcvRSInP+7kw2pavdXX4G+qxMH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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