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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df7cc81302d4ef533e2f92b6f265fd53eb9076e8a4d9a73f8a8e34ac72a56966' 
  AND token = 'qp2bh2mfO0qIEBj8o2ojFtWfZoRFuAzg7c7HpGtIKOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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