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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b141c48379b278ff8c2cd6ba817d9eadf42c415a74ceb04db241bb991b8eadea' 
  AND token = 'BH+Ni9mfBhDRxYs3xpeI9bWxuNX5KzqH5PAphqDExXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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