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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa4c1e4e640da39b06a68d42c6cfb9a104e1d50bf665125fb8503a7805bcbbcc' 
  AND token = 'Sv/lYcDBumcE1tloP/k0BpUVYpjdry1ZQw93rTXQTs0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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