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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07d93376dd4370c75667d1b83f32889a5c5b500b9c01f6f97f63f5d0fd2ff2ec' 
  AND token = 'NEuHi5JslvTha7c9OaUS39mCLmslUEWSGzuLhDuCvkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}