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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e797042a347d9a4de6fac23eca150cca42f94a6f4c0d5400850c538f6e8f5cd' 
  AND token = 'FXNmOkvMyCw+VSKh2KuKds/uoxxO9BcbWq8f+yHZ4+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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