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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65ad0320f8207a3c1d563260315e2e94d6104f8aaea888a6a062174b97f25875' 
  AND token = 'aOU6NcJbsJCch1jCMvD8bTt6QSyD/8m7gst+fZW0m1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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