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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3aaa375bff9711cca3ffb6740d3caad82c52206acdcd8e608c7982014025d9df' 
  AND token = '1qYeoj4Y/zD4jetKj2RBfMdM6WicZ+p5dxECy6I6mAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00112

JSON explain

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