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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '791b3b26ad1ed26df728f69810e1f9be90be92c5cba90c47d36665de724b1fd0' 
  AND token = 'YWWMGLdyI8h7R9p/plG5v4v1ZjGumk/tf7RxOf027Ns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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