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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac06e0224a4d0ecc115cd6f084a7b42b48396542af90f77cfb4f86ce57608af5' 
  AND token = 'tk9Dc5LzSA1aRslPV06pE+u3iTrzFl1jiabmNmq04kI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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