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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60e81d7c11226931cef0ac92b08ebb5faa05134b3f21037852dd30527510c7ad' 
  AND token = 'JjQbbycZ/wxqjoMEmmXsJCpYo93Z7PEj6u/ezUepUR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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