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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c1ee68e83e7cb8186eeb7e7e18f89eac3f73b2785cac7f3dd72a6d319cc2f05' 
  AND token = 'JvJSE9tV6QwpIFGQz5gHkKnrsT33ITFEe65oqtVbvPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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