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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '085df5baa9aec40b4b9375f4537bcaf8c8b48fed79644bfcba419e642f9b0c77' 
  AND token = '8Aiv5Yf9SnsNPhpm9mK0cfD4hKekbxmyufcwA+GzU2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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