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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9232b5cd76f7fb7da6fbaa7a8f5afbacacdf67f6de3d126d26eae9eaa156a7f9' 
  AND token = 'bRZ5g/gkm35wnbAbpGIgmIEOfYyW6mRaqNZc1FBhTCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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