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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05413cd819d5de3fcd60d8c85361996bde6ae234a171ac0fd77e71cbe3e425a3' 
  AND token = 'HXGLDGd8tPhhacwqAKJcOId0ArQ+Jea9HGvD5rV8MBw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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