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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8541b749c8582a622f28afc5594aa600347cf1d6e9f6c88625ea01efb60795f' 
  AND token = 'OOk/gJw1YId9tiP/d16JW8hqxn6iP3aFMAaiquC0rtA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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