Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cff01202e1cecdbf03265981f3919e6f866f37a3b7eedc973be114eb2ad2beeb' 
  AND token = 'kTGyBj0Xvl5t+fsfTdOkKg7e4V3wIAsMvxRNNRPjlLM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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